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Which pair of following statements is correct for orthogonal cutting using a single-point cutting tool?
P. Reduction in friction angle increases cutting force
Q. Reduction in friction angle decreases cutting force
R. Reduction in friction angle increases chip thickness
S. Reduction in friction angle decreases chip thickness
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- P and R
- P and S
- Q and R
- Q and S
Correct Option: D
2Φ + β –α = 90°
as β↓ Φ↑ so less force is required for cutting.
